Modelling Assumptions

• What does it mean if it is a smooth pulley?

  Tension on either side of the pulley is equal
• What does it mean by light string?

  Tension is equal throughout the string
• What does it mean by inextensible string?

  Both particles have same acceleration
• What does it mean if soemthing is a particle?

  • Ignore air resistance
  • Ignore rotational effects
• What does it mean if something is a rod?

  • Rigid, do it doesn't bend
  • No thickness